I have been in the SEO game for about a year now and have dealt with digital marketers of varying industries. We all get the typical outreach at some point "hey big fan of your site been a reader for a while and thought I'd help you out by giving you a great post that is relevant to your site. If you are interested let me know my only requirement is that you give me credit and a do follow link to my site". I hate this approach. Reason one being typically they are not truly a fan of your site which is fine but at least recognize that enough when the content you are pitching isn't relevant. I have had people reach out to be for guest post for their bands...we do small business education. Also the approach of it's me helping you when you are approaching me with an 18 DA, come on. My approach, actually take a look at the content that the site you are reaching out to focuses on. Scan their article for key words and where what you want would fit or what would be in their wheel house. Approach in a manner suggesting mutual benefit. Don't offer then pat yourself on the back for offering. In the immortal words of Kendrick Lamar "sit down, be humble". Here is an example of a pitch I would do-Hey John Doe, Saw your post on people seeing UFO's in Brooklyn back in 98. Really intriguing post I actually shared it on my social channels. I actually wrote an article on supposed abductions by martians in Queens in 97. Could be a great resource for your post. Check it out if you have a moment and if you find it relevant it would be great if you can link to it, if you can't no worries just let me know either way. Keep up the great content". I have built relationships and got on 60 DA with follow links sites (which I check to see with Moz if they have and that they are external) with this approach because it is genuine and concise. Try it out.